从侧边栏移除旧开发文档

[QingFeng-awa]

不认为被标记过时的开发文档仍然显示在侧边栏上。

此 PR 将旧开发文档从侧栏移除，同时防止搜索引擎和站内搜索索引此文档。
用户仍然可以通过输入该文档的 URL 访问该文档。

Summary by Sourcery

Documentation:

• 将旧的插件开发指南标记为不可被索引，并将其从文档侧边栏导航中隐藏。

Original summary in English

Summary by Sourcery

Documentation:

• Mark the old plugin development guide as non-indexable and hide it from the documentation sidebar navigation.

[sourcery-ai]

你好，我已经审查了你的更改——这里有一些反馈：

• 既然这个页面现在被视为已废弃并且已隐藏，建议对其他所有遗留文档也应用相同的 search: false 和 noindex 配置，以确保整个站点的行为一致。

给 AI Agent 的提示

Please address the comments from this code review:

## Overall Comments
- Since this page is now treated as deprecated and hidden, consider applying the same `search: false` and `noindex` pattern to any other legacy docs so the behavior is consistent across the site.

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Original comment in English

Hey there - I've reviewed your changes - here's some feedback:

• Since this page is now treated as deprecated and hidden, consider applying the same search: false and noindex pattern to any other legacy docs so the behavior is consistent across the site.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Since this page is now treated as deprecated and hidden, consider applying the same `search: false` and `noindex` pattern to any other legacy docs so the behavior is consistent across the site.

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[Soulter]

这个还需要一段时间才能从侧边栏移除。大概到十二月底会合并这个 PR。